Rotary pump and motor.



W. l. VINCENT.

ROTARY PUMP AND MOTOR.

Patented. Apr. 13,

4 SHEETS-SHEET 1.

APPLICATION FILED MAR. 7. I924.

W. J. VINCENT.

' ROTARY PUMP AND MOTOR.

APPLICATION FILED MAR. I. 1914.

Patented Apr. 13, 1915.

SHEETS-SHEET 2.

7 a V 52 \j FL/ I I 3] 35 a1 W \4 4 l/ A 17 W 33 m VIII 1! R a U M I R I f l qll l l l WVENTOR C NT w. 1. VINCENT.

ROTARY PUMP AND MOTOR.

APPLICATION FILED MAR. 7. 1914.

Patented Apr 13, 1915.

4 SHEETS-SHEET 3.

hTWESSIES W. J. VINCENT.

ROTARY PUMP AND MOTOR.

APPLICATION FILED MAR. 1. 19M.

4 SHEETS-SHEET 4.

flNH/EM OR J. VINCENT Patented Apr. 13, 1915.

L1 in t -11: j i 1;.

WILLIAM JOHN VINCENT, OF C t 1': IFJF,

RUTARY- PUMP AND MOTQRA,

ia-tare.

Specification of Letters Patent.

' Application filed. March 7,1914. Seria1No.823,166.

This invention relates to improvements in rotary pumps and motors and has reference to pumps and motors having radial bodlly rotatable cylinders whose'pistons cooperate with eccentrics on cam paths so that the working fluid is received into the outer ends of the cylinders during one part of the revolution of the cylinder body and expelled from those cylinders during the" other part of the revolution.

The present invention comprises a particular construction of suchv apparatus desi ned for simplicity of manufacture and e ciency of operation. A primary feature of this construction consists in forming the piston which operates in one cylinder integral with or positively connected to the piston operating in the cylinder diametrically opposite. That is to say, that the rotating cylinder body is provided with. an even number of cylinders diametrically opposite each other and the diametricallynopposite pistons are connected together and move in unison so that the suction stroke of one piston corresponds exactly to the delivery stroke of the opposite piston connected to it and moving in unison with it. The reciprocation of the pistons is derived from a roller or rollers mounted eccentrically to the axis of rotation of the cylinder body which is of course the primary axis of the machine and it will be understood that the stroke of the pistons will depend upon the degree to which the one axis is eccentric to the other and in order to provide for variation of delivery and reversal of flow I propose to provide means for varying this eccentricity in order to vary the stroke of the pistons. This variation of stroke may be eifected by bodily sliding the eccentric rollers relative to the primary axis of the machine or by providing these rollers on compound eccentrics so that the rotation of one eccentric about the other will cause variation of the eccentricity. It will be understood that if provision. is made for adjustment of the eccentric center to either side of the primary axis of the machine reversibility can also be provided for with the cylinder body rotating always in one direction. The cylinders can all be arranged in the same plane or more than one row of cylinders can be provided in which case the cylinders of one row or plane may be staggered in-position relative to those in the other row or lane.

In the accompanying drawings I have illustrated various embodimentsv of my invention, Figure 1 being an end sectional elevation of a fixed stroke machineconstructed in accordance'with my invention. Fig. 2 is a sectional View thereof on line A-A of Fig. 1. Figs. 3 and tare similar views of a very simple'form of fixed strokemachine wherein only one pair of cylinders are employed. Fig. 5 is a transverse sectional view of a machine showing two rows of cylinders opcrating in conjunction with common suction and delivery chambers. Fig. 6 is a sectional view thereof on line B:'B of Fig. 5. Fig. 7 1s a transverse-section illustratin a machine very similar to that shown by Flgs. 1 and 2 but provided with means whereby the stroke of the pistons can be varied so as to provide for variation of delivery and reversibility of flow. Fig. 8 is a sectional view thereof on line C0 of Fig. 7. Figs. 9 and 10 are transverse sectional and elevational views respectively illustrating a modified method by means of which the stroke of the pistons may be varied.

Referring to these drawings and particularly to Figs. 1 and 2 the numeral 1 designates an outer casing divided into two parts by some suitable diaphragm or partition such as the bridges 2 and associated with each of these parts of the casing I provide a pipe or port one of which 3 operates as the suction or inlet and the other 4= the delivery or outlet "pipe or port. It will of course be understood that these inlet and outlet pipes or ports are reversible in function if the direction of rotation is reversed. Mounted to rotate centrally within this casing ll provide a cylinder body or rotor 5 in which diametrically opposite cylinders 6 are provided. In the machine shown in Figs. 1 and 2 four cylinders are provided. In this case two pistons structures 7 are provided, each piston structure having pistons at each end as shown. One of these pistons structures can be composed of a single casting with its center or trunk 8 recessed or slotted transversely as at 9 so as to permit of the center or trunk of the other piston structure pass ing through. The other piston structure Patented Apr. T3, lltltllii.

, would be constructed in two parts, one of which would carry the trunk and in assembling the machine the one piston structure would first be inserted with the piston ends located in their cylinders and the one portion of the other piston structure would then be inserted with the trunk portion located in the recess or slot provided in the other piston structure. The other portion of this second piston structure-which would preferably be the fourth piston-would then be attached to the trunk by means of a set screw or set screws 10 or the like. Mounted eccen trically relative to the primary axis of the machine I provide a steel or other suitable pin 11 which extends approximately half way across the machine and is thus contained within recesses in the piston structure as shown in the drawings. Upon this pin 11 I mount rollers 12 and 13, the inner of which rollers has 'an end wall 14 which incloses the end of the pin 11 and is provided with a sleeve 15 upon which the other roller 12 'is mounted so that the two rollers are mounted upon the same axis. Thepin 11 is preferably bored right through, the opening 16 thus provided serving to take some form of lubricant, and seeing that the end of this opening is closed by the wall of the inner roller the lubricant is forced to circulate around the pin, and radial bores such as 17 proceeding from the central bore may be provided to conduct the lubricant to the desired positions. Each of the rollers 12 and 13 aforesaid co6perates with one or other of the pistons, clearances 18 being provided to insure that each of the piston structures only comes into contact with its own roller. The separate roller for each of the piston structures is provided to accommodate the differential circumferential travel of the pistons relative to the rollers due to the eccentricity. 'The outer cylindrical casing of the machine is of course closed by means of a circular side plate or plates. In operation assuming the machine to be in use as a. pump, the cylinder body or rotor 5 is driven by means of a shaft 19 connected to it, and the cotiperation of the pistons 7 with the eccentrically situated rollers aforesaid causes reciprocation of the pistons and fluid is drawn into the cylinders from one side of the casing and is expelled from the other side as will be readily understood by those conversant with this type of apparatus. In

' order to provide a convenient means for compensating for any wear which may tend to cause leakage past the bridges or partitions 2 in the casing 1 I propose to construct thebridges removable, and interchangeable liners indicated at 20 01? thin metal may be provided so that in the case of wear these liners may be rearranged or renewed. The bridge 2 at thetop of the machine is preferably given a distinct overlap as indicated at 21 so that as the cylinderspass the bridge the shock due to liquid pressure on the one side of the machine precedes the shock due to the vacuum on the other side of the machine. In the absence of this overlap the two shocks would be simultaneous and the overlap is provided in order to obviate this double shock.

In Figs. 3 and 4 a machine very similar to that previously described is illustrated. In these figures the numeral 22 designates the casing, 23 the bridges or partitions, 24 the inlet or suction pipe and 25 the outlet or delivery pipe. The single piston structure is indicated by the numeral 26 having a slot 27 in its trunk within which a roller 28 mounted upon an eccentrically situated pin 29 is located and it will be clear that as the rotor 30 rotates the piston structure 26 reciprocates in the cylinders 31 by reason of the eccentricity of the pin 29 and assuming the machine to be operating as a pump liquid will enter through the suction pipe 24 and be expelled through the outlet or delivery pipe 25. The driving shaft 32 is shown supported by an elbow bracket 33 in this instance.

In Figs. 5 and 6 I have illustrated a fixed stroke machine having two rows of cylinders 35 formed in a common rotor 36 cooperating with common inlet and outlet pipes 37 and 38 respectively. The rotor 36 is provided with a central disk 39 to which the driving shaft 40 is rigidly attached and the rotor is divided at 41 and 42 to permit of the fitting of the pistons 43 the casing parts being secured together by bolts. The end walls 44 of thecasing 45 are formed with eccentric bosses 46 upon which the rollers 47, with which the piston structures 43 cotiperate, are mounted. These eccentric bosses 46 are preferably provided with lubrication channels 48 and 49. The pistons are connected together as before but the yokes 50 are slotted as at 51 and in these slots the eccentric rollers 47 are located. The central disk 39 of the rotor is provided with passages 55 so that any liquid leaking past the pistons can flow freely from one side to the other.

In Figs. 7 and 8 I have illustrated one convenient method by means of which the stroke of the pistons may be varied to provide for variation and reversibility of delivery with constant rotation of the rotor in one direction. In this case I provide a compound eccentric, the members 56 and 57 of which are rotatable relatively to each other and are mounted upon the fixed pin 58. The member 56 is connected to an internally toothed flange 59 and the member 57 is provided with teeth 60. A pinion 61 supported in the bearing 62 carried by the end wall 63 of the casing gears the two eccentric members 56 and 57 together and it rgr'aaart a slot 67 in the disk or ring 65.

pm. ]By turning the screw 70 Another method of varying the degree of eccentricity between the eccentric rollers and the axis of the machine is shown in Figs. 9 and 10. lln this case the pin'6 8upon which the eccentric rollers are mounted in the manner before described is attached to sliding plates 69 and a screw 70 o'perates'hn a tapped opening in the outer end of the the pin 68 will be bodily moved so'thatits am's can be arranged at various positions in a straight line on either side of the primary axis of the machine, a slot 71 being provided in the wall 72 to accommodate the movement.

What I claim and desire to secure by Letters Patent is:

l. A hydraulic machine comprisin a casing, a rotatable cylinder body wit in the casing, radial cylinders formed in said body,

piston structures operating in the cylinders, one of said structures consistin of a transversely slotted trunk portion aving integrally formed piston heads at its ends, an-, other of said structures having a trunk portion adapted to pass though the slot in said first mentioned trunk portion and beingprovided with an integral piston head atone end and a detachable piston at the other end thereof, a pin on the casing, eccentric to the ams of the cylinder body, an inner and an outer roller on said pin, the inner of said rollers being provided .withasleeve upon which said outer roller rotates, said piston structures coiiperating respectively with the said rollers whereby opposing piston heads are caused to reciprocate in unison.

' 2. A hydraulicmachine comprising a casing, a rotatable cylinder body within the casing, an even number of diametrically opposed radial cylinders formed in said body, an even number of piston heads operating in said cylinders and being connected together in pairs, a support projecting iromthe casing into the rotatable cylinder body, said support being eccentric to the 'am's of rotation ofthe cylinder body, an inner and an outer roller on said support, said inner roller adapted to engage the connecting means hetween one of said pairs of piston heads and the outer roller adapted to enga e theconnecting means between another 0 said pairs cylinders, gearing pinion, ll provide the toothedsaid casing,

of piston heads whereby the piston heads of a pair are caused to operate in unison.

3. A hydraulic machine comprising a casing, a rotatable cylinder body within the casing, said cylinder body being formed with radial cylinders, pistons operating in said removable bridges dividing said casing into suction and delivery chambers, and interchangeable metallic, lining members between said bridges and the casing.

4. Ahydraulic machine comprising a casing, a rotatable cylinder body Within said casing, said body being provided with radial cylinders, pistons operating in said cylinders substantially oppositely disposed segmental bridges dividing said casing into suction and delivery chambers, one of said bridges being of greater circumferential length than the other of. said bridges whereby the shock due to. liquid pressure upon one-side of the ma chine precedes the shock due to vacuum on the other side of the machine.

. 5. A hydraulic machine comprising a casing, a rotatable cylinder body within the "casing, radial cylinders formed in said body,

piston structures operating in the cylinders each having opposing piston heads, a pin on eccentric to the axis of the cylinder body, an inner and an outer roller on said pin, one of said rollers being provided with a sleeve upon which the other roller rotates, said piston structures cotiperating respectively with the said rollers whereby opposing piston heads are caused to reciprocarts in unison. I

6. A hydraulic machine comprising a casing, a rotatable cylinder body within the casing, radial cylinders formed in said body, piston structures operating in the cylinders, one of said structures consisting of a transversely slotted trunk ing'piston heads, another of said structures having a trunk portion adapted to pass through the slot in said first mentioned trunk portion and being also provided with opposing piston heads and means adapted to engage said piston structures-whereby opposing piston -heads arecaused to reciprocate in unison.

7. A hydraulic machine comprising a casing, a rotatable cylinder body within the casing, radial cylinders termed in the cylinder body, piston structures operating in the cylinders each having opposing piston heads, a fixed support on the casing, eccentric to the axis of the cylinder body, an inner and an outer roller on said support, said piston structures coiiperating respectively with said rollers whereby opposing pistoii-heads are ing, a rotatable cylinder body' within the portion having opposcasing, radial cylinders formed in said body,

piston structures operating'in the cylinders, one of said structures consisting ot a tra-- verselyslotted trunk portion ha opposing piston heads, another of said ructures having a trunk portion adapted :to pass through the slotinsaid first mentioned trunk portion and being also provided with opn10. Ahydraulio machine comprisinga casing, a rotatable cylinder body within the casin said bodybeing provided with radial cylin ers, pistons operating insaid cylinders, oppositely disposed means dividing said casing into suctlon and delivery chamhers, the relative construction of said oppositely disposed means being such whereby the shock due to liquid pressure upon one side of the machine precedes the shock due to vacuum on the otherside of the machine.

Intestimon whereof I aflix my signature 30 "in presence 0 two witnesses.

'WILLIAM JOHN VINCENT.

' [Witnessesz EDWARD A, Eve, 0. J WORTH. 

